The image depicts meshed silhouettes of various things.The original image is an OCAL clipart called "Enter FOSSASIA 2016 #IoT T-shirt Design Contest" uploaded by "openclipart".Thanks.
Source Yamachem
Lovely pattern with splattered vintage speckles.
Source David Pomfret
Textured Red Brown Plastic, Free Background Pattern. Although there's already enough plastic in our lives, let's bring it to the web too.)
Source V. Hartikainen
A seamless pattern the unit cell for which can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
This background pattern looks like bamboo to me. Feel free to download it for your website (for your blog perhaps?).
Source V. Hartikainen
Prismatic Abstract Background Design
Source GDJ
A new take on the black linen pattern. Softer this time.
Source Atle Mo
Paper model of a tetrahedron. Modelo de papel de um tetraedro.
Source laobc
From a drawing in 'Gately's World's Progress', Charles Beale, 1886.
Source Firkin
Inspired by a drawing in 'Poems', James Smith, 1881.
Source Firkin
White fabric looking texture with some nice random wave features.
Source Hendrik Lammers
Prismatic Geometric Pattern Background No Black
Source GDJ
He influenced us all. “Don’t be sad because it’s over. Smile because it happened.”
Source Atle Mo
A seamless pattern of dark bricks. Maybe it's not very realistic, but it looks good in my opinion.
Source V. Hartikainen
Might not be super subtle, but quite original in its form.
Source Alex Smith
A grayscale fabric pattern with vertical lines of stitch holes.
Source V. Hartikainen
On a large canvas you can see it tiling, but used on smaller areas, it’s beautiful.
Source Paul Phönixweiß
An attempt for cleaning up the original image in a few steps.
Source Lazur URH
Sharp but soft triangles in light shades of gray.
Source Pixeden
You know I love paper patterns. Here is one from Stephen. Say thank you!
Source Stephen Gilbert
Horizontal and vertical lines on a light gray background.
Source Adam Anlauf
Colour version of a pattern that came out of playing with the 'light rays' plug-in for Paint.net
Source Firkin
This is the remix of an OCAL clipart called "Art Nouveau ornament" uploaded by "microcosme".Thanks.This is a seamless pattern of an Art Nouveau ornament.
Source Yamachem